675640771 has 4 divisors (see below), whose sum is σ = 727613152. Its totient is φ = 623668392.

The previous prime is 675640739. The next prime is 675640783. The reversal of 675640771 is 177046576.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 675640771 - 2⁵ = 675640739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675670771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25986171 + ... + 25986196.

It is an arithmetic number, because the mean of its divisors is an integer number (181903288).

Almost surely, 2^675640771 is an apocalyptic number.

675640771 is a deficient number, since it is larger than the sum of its proper divisors (51972381).

675640771 is a wasteful number, since it uses less digits than its factorization.

675640771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51972380.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 675640771 is about 25993.0908319884. The cubic root of 675640771 is about 877.4828078655.

The spelling of 675640771 in words is "six hundred seventy-five million, six hundred forty thousand, seven hundred seventy-one".